Anthropic: Claude Opus 4 vs Anthropic: Claude Sonnet 4.5
Side-by-side comparison of Anthropic: Claude Opus 4 and Anthropic: Claude Sonnet 4.5. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
strong confidenceAnthropic: Claude Sonnet 4.5 leads overall
Anthropic: Claude Sonnet 4.5 leads in price and context window and max output, making it the stronger choice for most workflows. Anthropic: Claude Opus 4 remains a solid alternative depending on your specific needs.
Best for with Anthropic: Claude Opus 4
Best for with Anthropic: Claude Sonnet 4.5
Side-by-side
Technical specifications
| Anthropic: Claude Opus 4 | Anthropic: Claude Sonnet 4.5 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Input price | $15/M | $3/M |
| Output price | $75/M | $15/M |
| Context window | 200K | 1.0M |
| Max output | 32K | 64K |
| Capabilities | Tool useVisionReasoning | Tool useVisionReasoning |
| Released | May 22, 2025 | Sep 29, 2025 |
Scoring breakdown
How each dimension compares
Price
Anthropic: Claude Sonnet 4.5 leadsAnthropic: Claude Opus 4
$75/M tokens
Anthropic: Claude Sonnet 4.5
$15/M tokens
Context Window
Anthropic: Claude Sonnet 4.5 leadsAnthropic: Claude Opus 4
200K tokens
Anthropic: Claude Sonnet 4.5
1.0M tokens
Capabilities
Anthropic: Claude Opus 4
3/4
Anthropic: Claude Sonnet 4.5
3/4
Max Output
Anthropic: Claude Sonnet 4.5 leadsAnthropic: Claude Opus 4
32K tokens
Anthropic: Claude Sonnet 4.5
64K tokens
Recency
Anthropic: Claude Opus 4
May 2025
Anthropic: Claude Sonnet 4.5
Sep 2025
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